The Bible / Jesus said: "If your eye be single, your whole body will be full of light."

Meaning: If your pineal gland is cleared and energized, you will have asingle spiritual eye that will function as a window into the spiritworld, but it will also allow maximum energy to come down from yourhigher self to illuminate the chakra system in your physical body,producing full enlightenment all the way down into your physical body.

I have never seen a traditional Christian interpret this correctly. Some new age Christians do, though.